Applications Of Epr And Nmr Spectroscopy In Homogeneous Catalysis

This book reviews advances in important and practically relevant homogeneous catalytic transformations, such as single-site olefin polymerizations and chemo- and stereo-selective oxidations. Close attention is paid to the experimental investigation of the active sites of catalytic oxidation systems and their mechanisms. Major subjects include the applications of NMR and EPR spectroscopic techniques and data obtained by other physical methods. The book addresses a broad readership and focus on widespread techniques available in labs with NMR and EPR spectrometers.

4.2.1.2 Activation of L2iPrFeCl2 with AlMe3 -- 4.2.2 Bis(imino)pyridine Cobalt Ethylene Polymerization Catalysts -- 4.2.2.1 Activation of L2iPrCoIICl2 with MAO -- 4.2.2.2 Activation of L2iPrCoIICl2 with AlMe3 -- 4.2.3 a-Diimine Vanadium(III) Ethylene Polymerization Catalysts -- 4.2.3.1 System L2MeVCl3/AlMe3/[Ph3C][B(C6F5)4] -- 4.2.3.2 System L2MeVCl3/MAO -- 4.2.4 Ethylene Polymerization Precatalyst Based on Calix[4]arene Vanadium(V) Complex -- 4.2.4.1 Reaction of Calix[4]arene Vanadium(V) Complex with AlEt2Cl -- 4.2.4.2 Reaction of Calix[4]arene Vanadium(V) Complex with AlMe2Cl -- 4.2.4.3 Reaction of Calix[4]arene Vanadium(V) Complex with AlEt3 -- 4.2.5 Neutral NiII2-(N, O)-salicylaldiminato Olefin Polymerization Catalysts -- 4.2.5.1 Chain-Propagating Species Formed upon Ethylene Polymerization with Neutral Salicylaldiminato Nickel(II) Catalysts -- 4.2.5.2 Evaluation of the Size of Ni-Polymeryl Species by PFG NMR Spectroscopy -- 4.2.5.3 Catalyst Deactivation -- 4.2.6 Formation of Cationic Intermediates upon the Activation of Bis(imino)pyridine Nickel Catalysts -- 4.2.7 Cationic Intermediates Formed upon the Activation of Ni(II) Catalysts with AlMe2Cl and AlEt2Cl -- 4.3 On the Origin of Living Polymerization over o-Fluorinated Post-Titanocene Catalysts -- 4.4 Selective Ethylene Trimerization by Titanium Complex Bearing Phenoxy Imine Ligand -- References -- Index

Advances in Organometallic Chemistry, Volume 73, the latest release in this longstanding serial, is known for its comprehensive coverage of topics in organometallic synthesis, reactions, mechanisms, homogeneous catalysis, and more. It is ideal for a wide range of researchers involved in organometallic chemistry, including synthetic protocols, mechanistic studies and practical applications. Specific chapters in this new release include Metal carbonyl promoted multicomponent coupling of alkyne for synthesis of heterocyclic compounds, Group 10 metal(0) complexes stabilized by phosphorus and carbon donor ligands, Synthesis of Nitrogen-containing Molecules via Transition Metal-Catalyzed Reactions on Isoxazoles, Anthraniils and Benzoisoxazoles, and more. Contains contributions from leading authorities in the field of organometallic chemistry Covers topics in organometallic synthesis, reactions, mechanisms, homogeneous catalysis, and more Informs and updates readers on the latest developments in the field Carefully edited to provide easy-to-read material

While chemists using spectroscopic methods need to learn from the specialists, they do not normally read the spectroscopists' original papers. This book provides this very information -- summarizing some recent advances in the mechanistic understanding of metallocene polymerization catalysts and the role of NMR spectroscopy in these endeavors. Adopting a real practice-oriented approach, the authors focus on two of the most important spectroscopic techniques with two parts devoted to each of NMR and IR spectroscopy - as well as on important industrial applications with regard to the reaction discussed. Rather than providing a complete and exhaustive review of homogeneous hydrogenation and its detailed mechanisms, the book focuses on the specific spectroscopic techniques and the mechanistic information that has been obtained from their application. The result is unique in its scope, allowing chemists from different fields to learn which techniques can be applied for their specific synthetic problems. The prizewinning editor, Professor Brian Heaton, is the key player in the field, and has brought together here a team of authors to cater for specialists, and researchers in industry and academia.

Homogeneous Hydrogenation and Metathesis Reactions, a volume in the Advances in Catalysis series, covers hydrogenation and metathesis reactions in two separate sections. The first section is devoted to homogeneous hydrogenation reactions and related processes, including hydrogenation of alkenes, esters, olefins, etc. In the second section, the metathesis reactions of olefins, alkenes, and alkynes are presented. In addition, the industrial application of homogeneous metathesis reactions is investigated. Includes thermodynamic and kinetic studies of homogeneous catalysts Describes transition metal, ligand and solvent role in homogeneous catalysts Explains preparation, characterization, deactivation and regeneration of homogeneous catalysts Presents homogeneous catalysts by clusters, carbenes, fixed metal-complexes, and liquid-liquid multiphase catalysts

Elucidating Organic Reaction Mechanisms using photo-CIDNP Spectroscopy, by Martin Goez. Parahydrogen Induced Polarization by Homogeneous Catalysis: Theory and Applications, by Kerstin Münnemann et al. Improving NMR and MRI Sensitivity with Parahydrogen, by R. Mewis & Simon Duckett. The Solid-state Photo-CIDNP Effect, by Jörg Matysik et al. Parahydrogen-induced Polarization in Heterogeneous Catalytic Processes, by Igor Koptyug et al. Dynamic Nuclear Polarization Enhanced NMR Spectroscopy, by U. Akbey & H. Oschkinat. Photo-CIDNP NMR Spectroscopy of Amino Acids and Proteins, by Lars T. Kuhn.

Comprehensive, Up-to-Date Coverage of Spectroscopy Theory and its Applications to Biological SystemsAlthough a multitude of books have been published about spectroscopy, most of them only occasionally refer to biological systems and the specific problems of biomolecular EPR (bioEPR). Biomolecular EPR Spectroscopy provides a practical introduction t

Redox-Active Ligands Authoritative resource showcasing a new family of ligands that can lead to better catalysts and promising applications in organic synthesis Redox-Active Ligands gives a comprehensive overview of the unique features of redox-active ligands, describing their structure and synthesis, the characterization of their coordination complexes, and important applications in homogeneous catalysis. The work reflects the diversity of the subject by including ongoing research spanning coordination chemistry, organometallic chemistry, bioinspired catalysis, proton and electron transfer, and the ability of such ligands to interact with early and late transition metals, lanthanides, and actinides. The book is divided into three parts, devoted to introduction and concepts, applications, and case studies. After the introduction on key concepts related to the field, and the different types of ligands and complexes in which ligand-centered redox activity is commonly observed, mechanistic and computational studies are described. The second part focuses on catalytic applications of redox-active complexes, including examples from radical transformations, coordination chemistry and organic synthesis. Finally, case studies of redox-active guanidine ligands, and of lanthanides and actinides are presented. Other specific sample topics covered include: An overview of the electronic features of redox-active ligands, covering their historical perspective and biological background The versatility and mode of action of redox-active ligands, which sets them apart from more classic and tunable ligands such as phosphines or N-heterocyclic carbenes Preparation and catalytic applications of complexes of stable N-aryl radicals Metal complexes with redox-active ligands in H+/e- transfer transformations By providing up-to-date information on important concepts and applications, Redox-Active Ligands is an essential reading for researchers working in organometallic and coordination chemistry, catalysis, organic synthesis, and (bio)inorganic chemistry, as well as newcomers to the field.

Reactive, but not a reactant. Heterogeneous catalysts play an unseen role in many of today's processes and products. With the increasing emphasis on sustainability in both products and processes, this handbook is the first to combine the hot topics of heterogeneous catalysis and clean technology. It focuses on the development of heterogeneous catalysts for use in clean chemical synthesis, dealing with how modern spectroscopic techniques can aid the design of catalysts for use in liquid phase reactions, their application in industrially important chemistries - including selective oxidation, hydrogenation, solid acid- and base-catalyzed processes - as well as the role of process intensification and use of renewable resources in improving the sustainability of chemical processes. With its emphasis on applications, this book is of high interest to those working in the industry.